Carol
Both the assessor and the CM should review your form, any evidence attached to it, the previous claim form especially if it is PIP2, the previous assessment report so whilst you cabn and any evidence that is collected as part of the review.
I'm sure that many do but it is clear that some don't and the recommendation and Decision are based primarily on the form and what is attached so whilst you can just say "no change" you should think carefully about providing a more detailed response.
Gordon
Nothing on this board constitutes legal advice - always consult a professional about specific problems